[NET]: Rework dev_base via list_head (v3)
Cleanup of dev_base list use, with the aim to simplify making device
list per-namespace. In almost every occasion, use of dev_base variable
and dev->next pointer could be easily replaced by for_each_netdev
loop. A few most complicated places were converted to using
first_netdev()/next_netdev().
Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Acked-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 088888d..7f95e6e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -910,7 +910,7 @@
*/
read_lock(&dev_base_lock);
rcu_read_lock();
- for (dev = dev_base; dev; dev = dev->next) {
+ for_each_netdev(dev) {
if ((in_dev = __in_dev_get_rcu(dev)) == NULL)
continue;
@@ -989,7 +989,7 @@
read_lock(&dev_base_lock);
rcu_read_lock();
- for (dev = dev_base; dev; dev = dev->next) {
+ for_each_netdev(dev) {
if ((in_dev = __in_dev_get_rcu(dev))) {
addr = confirm_addr_indev(in_dev, dst, local, scope);
if (addr)
@@ -1182,23 +1182,26 @@
int s_ip_idx, s_idx = cb->args[0];
s_ip_idx = ip_idx = cb->args[1];
- for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
+ idx = 0;
+ for_each_netdev(dev) {
if (idx < s_idx)
- continue;
+ goto cont;
if (idx > s_idx)
s_ip_idx = 0;
if ((in_dev = __in_dev_get_rtnl(dev)) == NULL)
- continue;
+ goto cont;
for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
ifa = ifa->ifa_next, ip_idx++) {
if (ip_idx < s_ip_idx)
- continue;
+ goto cont;
if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
RTM_NEWADDR, NLM_F_MULTI) <= 0)
goto done;
}
+cont:
+ idx++;
}
done:
@@ -1243,7 +1246,7 @@
ipv4_devconf_dflt.forwarding = on;
read_lock(&dev_base_lock);
- for (dev = dev_base; dev; dev = dev->next) {
+ for_each_netdev(dev) {
struct in_device *in_dev;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 2506021..f4dd474 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -2288,9 +2288,8 @@
struct ip_mc_list *im = NULL;
struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
- for (state->dev = dev_base, state->in_dev = NULL;
- state->dev;
- state->dev = state->dev->next) {
+ state->in_dev = NULL;
+ for_each_netdev(state->dev) {
struct in_device *in_dev;
in_dev = in_dev_get(state->dev);
if (!in_dev)
@@ -2316,7 +2315,7 @@
read_unlock(&state->in_dev->mc_list_lock);
in_dev_put(state->in_dev);
}
- state->dev = state->dev->next;
+ state->dev = next_net_device(state->dev);
if (!state->dev) {
state->in_dev = NULL;
break;
@@ -2450,9 +2449,9 @@
struct ip_mc_list *im = NULL;
struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
- for (state->dev = dev_base, state->idev = NULL, state->im = NULL;
- state->dev;
- state->dev = state->dev->next) {
+ state->idev = NULL;
+ state->im = NULL;
+ for_each_netdev(state->dev) {
struct in_device *idev;
idev = in_dev_get(state->dev);
if (unlikely(idev == NULL))
@@ -2488,7 +2487,7 @@
read_unlock(&state->idev->mc_list_lock);
in_dev_put(state->idev);
}
- state->dev = state->dev->next;
+ state->dev = next_net_device(state->dev);
if (!state->dev) {
state->idev = NULL;
goto out;
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 597c800..342ca8d 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -192,7 +192,7 @@
if (dev_change_flags(&loopback_dev, loopback_dev.flags | IFF_UP) < 0)
printk(KERN_ERR "IP-Config: Failed to open %s\n", loopback_dev.name);
- for (dev = dev_base; dev; dev = dev->next) {
+ for_each_netdev(dev) {
if (dev == &loopback_dev)
continue;
if (user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :